Nginx config file: remove text/html from gzip_types
Nginx config file: remove text/html from gzip_types

As stated by https://nginx.org/en/docs/http/ngx_http_gzip_module.html, text/html is always part of the gzip_types. This removes a warning when checking the Nginx configuration files.
Green-Star/PeerTube,Chocobozzz/PeerTube,Green-Star/PeerTube,Green-Star/PeerTube,Chocobozzz/PeerTube,Green-Star/PeerTube,Chocobozzz/PeerTube,Chocobozzz/PeerTube